Trolley-base.



If. VOLK. TROLLBY man. APPLICATION IXLED NOV. 3, 1908.

933,505 Patentpd Sept. 7, 1909.

anuzntoz wi ha can:

FERDINAND VOLK, 0F PITTSBUlRG; PENNSYLVANIA.

TBODLEY-IBLBE.

Specification Letter: Patnt.

Application filed November 8, 1908. Serial No. 480,920.

Patented Sept. 7',

To all whom it may concern:

Be it known that I, FERDINAND VoLK, a citizen of the United States of America,

residing at Pittsbur in the countyof Al legheny and State 0 Pennsylvania, have invented certain new and useful Im 'rovements in Trolley-Bases, of which the ollowing is a specification, reference being had therein t t 1e accompanying drawing.

This invention relates to a trolley base, and the primary object'of my invention is to rovide a novel revoluble trolley base where- 1n positive and reliable means are employed for normally holding a trolley pole under tension. I

A further obfect of this invention is to provide a simp e, inexpensive and durable trolley base having oppositely disposed vertical s rings indirectly connectedto atro'lley pole or normally maintaining the same in an upright position.

M invention aims to provide an anti frictional spring connection for trolley poles,

. established by the employment of roller bearings, which engage a movable spring housing.

My trolley base is designed to maintain an equal pressure of the trolley wheel upon a wire with the varied position of a tro ley pole; thereby preventingtrolley wheel displacement, and insuring a cotiperation of the workin elements of a street car.

The etaiLconstruction entering into my invention will be presently described and then s cificall y-clalmed. V

In 1 1e drawings, Figure 1 is a side elevation of the trolley base with the trolley pole' .thereof'almost in a vertical position,

1 2 is a vertical longitudinal sectional view, ig. 3 is a side elevation with the trolley pole in a horizontal position, and Fig. 4 is a plan of the same.

In the accompanying drawings, 1 designates the top of a car provided with a circu lar plate 2 of an insulating material, as fiber. Mounted upon the plate 2 is a circular bearing plate 3 having a central tubnlal i114 provided with small lubricant openlngs 5. In the pin 4 is placed waste or a similar material 6.

Revolubly mounted upon thebearing plate 3 and surrounding the in at isa c. 7 having longitudinal extensions 8 provi ed with vertical tubular posts 9. Surnounding said posts and bearing upon the en ensions 8 are coil springs 10, and mounted upon the upper nected at the sides thereof b ends of said s rings are housings 11 conlongitudinal fianged rails 12, the inwar ly projecting flanges 13 of said rails serving functionally as tracks. Each housing 11 has on the side, adjacent the cap '7, a la 11', which lu hold the frame formed by t e rails 12 an housings 11 against tilting movement. The sides of the ca 7 are provided with trunnions 14 for a yo e 15 carrying a trolley ole 16. The ends of the yoke 15 are provi ed with lugs l'i'and-revolubly connected to said lugs are wheels or rollers 18 ads ted to ride upon the flanges 13 of'sthe longitudinal rails 12. The ln s 17 are arranged at an angle to the ends 0 the yoke 15,"w hereby the tension of the springs 10 will normally force upwardly upon the wheels or rollers 18 and maintain the trolley pole'16 approximately vertical, the extreme. vertical position of the trolley pole being limited. bystheddvtr end of the yoke 15 engaging thetr'ackfian es13 of the rails 12. he cap 7 is provide with a central o ening 20 whereby a lubricant can be place upon the waste 6 within the pin 4.

Operation: When the trolley pole 16 is pulled downwardly with the trunnions 14 as a pivot point, the spring 10 at the ri ht hand side of the trolley base (as view in the drawin is laced under tension slightly in a vance o the spring on the left hand side thereof, but. as the trolley pole travels downwardly and the wheels or rollers 18 travel toward the pivot point of the trolley pole, the pressure isdistributed and both springs are under tension as shown by the osition of the housings 11 in Fig. 3 of. the rawings.

The novel manner in which the trolls pole is trunnioned and the use of the whee s or rollers 18 provides an equalizing device which insures positive and simultaneous action of the springs 10.

I reserve the right to use anti-friction balls in lieu of the wheels or rollers 18; to substitute skeleton inclosures for the springs 10; to employ suitable insulating material where necessary; to use springs of various types and to make various changes in the details of construction, as to the shape, proplate. a tubular pin carried thereby, a cap revolubly mounted upon said pin and havinglongitudinal extensions provided with tubulayposts, coil springs encircling said )osls housings mounted upon said springs, ionqiludinal rails connecting said housings providing. tracks, a yoke trun'nioned upon said cap and adapted to support a trolley pole, angularly dis osed lugs carried by the ends of said yo e, wheels revolubly connected to said lugs and ads )ted to travel upon the tracks of said rai s, and means whereby the bearing between said cap and pin can be lubricated.

'2. A rolle base comprising a bearing plate, a tubu ar pin carried thereby, a cap revolhbly mounted upon said pin and havin longitudinal extensions provided with tu ullai posts, coil springs encircling said posts; housings mounted upon said springs, longitudinal rails connecting said housings and providing tracks, a yoke trunnioned upon 'said cap and adapted to support a trolley pole, angularly disposed lugs carried by the ends o said yoke, and wheels revolu ily connected to said In and adapted to travel upon the tracks 0 said rails.

3. A trolley base comprising a revoluble cap, tubular posts carried thereby,\springs encircling said posts, housings mounted upon said springs, rails connecting said housings, a yoke trunnioned upon sald ca and adapted to support a. trolley pole, and Wheels revolubly carried by said okc for engaging said rails and placing sair springs under tension when said yoke is lowered.

4. A trolley base comprising a pin, a revo-' luble cap mounted upon said pin, 5 ringsupported housings carried by sai, cap, rails connecting said housings, a yoke trunnioned upon said cap for supporting a trolley pole, and anti-friction means carried by said yoke and on aging said rails for'plac iugthe springs 0' said housings under tension when said yoke is lowered.

5. Atrollcy base comprising a cap support, a cap revolubly-mounted on said support, springs carried by the cap, housings mounted on the springs, tracks connecting the housings, a yoke connected to the cap.

and means carried by the yoke to engage the said tracks and simultaneously depress said housings to place the aforesaid springs under tension.

In testimony whereof I aflix my signature in the presence of two Witnesses.

FERDINAND VOLK. Witnesses:

MAX H. SaoLovnz,

A. Truss. 

